The song “Two Black Cadillacs” was cowritten by Carrie with Josh Kear and Hillary Lindsey. As Carrie explained in a promotional video earlier this year, it’s an “epic dark story” about “two women who are both being done wrong by the same man.” One’s the wife, the other’s the mistress, but as Carrie says, “you root for them both, because it’s not their fault.”

And when they find out, what do they do about it? “Well,” Carrie says with a grin that’s somewhere between innocent and a little wicked, “they kill him.” Ouch! “It’s dark, it’s stormy, it’s dramatic, like a soap opera.”

The melody is murky and moody, with a tension that rises throughout the song and matches the storyline.

As Carrie noted in an earlier tweet, she wanted to unveil the news to fans herself, before she was asked the question during an interview.